CN104634703B - Air ion Mobility Spectrum Analysis method and instrument - Google Patents
Air ion Mobility Spectrum Analysis method and instrument Download PDFInfo
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- CN104634703B CN104634703B CN201310576411.0A CN201310576411A CN104634703B CN 104634703 B CN104634703 B CN 104634703B CN 201310576411 A CN201310576411 A CN 201310576411A CN 104634703 B CN104634703 B CN 104634703B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010183 spectrum analysis Methods 0.000 title claims description 13
- 238000005040 ion trap Methods 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 238000001228 spectrum Methods 0.000 claims abstract description 11
- 230000010287 polarization Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 13
- 238000013508 migration Methods 0.000 claims description 8
- 230000005012 migration Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 abstract description 73
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000001871 ion mobility spectroscopy Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 150000001450 anions Chemical class 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract description 2
- 150000001768 cations Chemical class 0.000 abstract description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 230000037230 mobility Effects 0.000 abstract 6
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000013441 quality evaluation Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 52
- 238000010586 diagram Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 239000000809 air pollutant Substances 0.000 description 3
- 231100001243 air pollutant Toxicity 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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Abstract
A kind of method and instrument of the measurement of air ion mobility spectrum.Air ion mobility spectrum is divided into several sections according to different ionic mobility values by this measurement method.The airion concentration value in each ionic mobility section is measured respectively；To form complete ion mobility spectrometry.The measuring instrument uses capacitor suction-type air ion collector, in conjunction with various forms of ion traps such as single channel and multichannel, can carry out it is small, in, it is big, again and the test of the airion concentration value in all kinds of different ions mobilities section such as superheavy ion, make complete ionic mobility spectrogram.It can both measure cation, can also measure anion.It further comprises and is controlled using MCU, intelligent decision insulation performance and the scheme for driving away humidity are adapted to the test of field high humidity environment.It is the important means of a kind of Air Quality Evaluation and environmental monitoring.
Description
Technical field
The present invention relates to the methods and instrument of charged particle in a kind of measurement air, especially measure the instrument of air ion
Device.
Background technique
Small charged particle in air is known as air ion or air ion.Air ion is at unit strength (1V/m)
Movement speed under electric field action is known as ionic mobility.Ionic mobility is to differentiate an important ginseng of air ion size
Number.In general, ionic mobility is smaller, the partial size of ion is bigger.According in the past few decades come the researcher of many countries
The research of suspended particle size size relation in mobility and air for air ion.It can be by air ion according to moving
The of different sizes of shifting rate is divided into following a few classes (mobility is average mobility):
Small ion 1. (small cluster) mobility K=1.3cm2/VS diameter 0.85nm
Small ion group 2. (big cluster) mobility K=0.5cm2/ VS diameter 1.6nm
3. intermediate ion (intermediate) mobility K=0.034cm2/ VS diameter 7.4nm
4. light-duty big ion (light large) mobility K=0.0042cm2/ VS diameter 22nm
5. heavy big ion (heavy large) mobility K=0.00041cm2/ VS diameter 79nm
Superheavy ion 6. (super heavy) mobility K=0.00005cm20.4 μm of/VS diameter
The size of air ion partial size and the clean-up performance of ambient air are closely related.In clean atmosphere,
Air ion has bigger mobility, they belong to small ion.And then there is many gas in the air for having received pollution
Migration can be become after charge entrained by colloidal sol and the biggish particulate matter of partial size, these aerosols or particulate matter capture small ion
During rate is lower, big ion or heavy ion or even superheavy ion.The mobility that different air pollutants are formed by ion is
Different；Observe, study under the conditions of various Different climates and when various air pollutants occur air ion mobility spectrometry change
Change and can be used as a kind of foundation analyzed air quality, evaluate atmospheric pollution level.
According to the structure of the definition of ionic mobility and air ion collector, the meter of available air ion mobility
Calculate formula:
In formula: the K- collector ionic mobility limit (cm2/cm2/V·S)；
The distance between d- collecting board and polarising sheet (cm)；
VxAir velocity (cm/S) in collector；
L- collecting board length (cm)；
U- polarizing voltage (V).
Existing air ion measuring instrument is made of ion trap, micro current amplifier, polarization power supply and air exhauster etc..
Ion trap includes ioncollection plate, polarising sheet；The polarity for changing polarizing voltage can change the polarity of measured ion；
The length for changing the amplitude of polarizing voltage, the air velocity in collector and collecting board can change ionic mobility.
The covered ionic mobility of existing air ion measuring instrument institute can only achieve in small ion and sub-fraction from
The range of son；There are sizable gaps between complete air ion mobility spectrum.Scientific research the result shows that, to human body
Most of the air pollutants of health hazard especially severe are distributed in the scope of big ion, superheavy ion.Obviously, existing air from
The test result of sub- measuring instrument cannot reflect the quality status of air.It needs to be improved.
Summary of the invention
It is an object of that present invention to provide the methods and instrument of the measurement of air ion mobility spectrum.This measurement method is not according to
Air ion mobility spectrum is divided into several paragraphs (section) by same ionic mobility value, is based on MCU technology, is controlled, is surveyed respectively
Measure the airion concentration value in each paragraph section；And then form complete ion mobility spectrometry.This measuring instrument is adopted
With capacitor suction-type air ion collector, single channel and the various various forms of ion traps of multichannel are used in combination, it is complete
, until the air ion test of all kinds of different ions mobility values of superheavy ion, complete Ion transfer is made at from small ion
Rate spectrum.This measuring instrument can both measure cation, can also measure anion；Also accommodate the high humidity environment in field
In test.
The present invention is implemented as follows:
A kind of air ion Mobility Spectrum Analysis method, including following items content:
1. air ion mobility spectrum is divided into several sections according to different ionic mobility values by this method, and every section
The air ion in ionic mobility section is collected by a section ion trap；The collecting board connection of every section ion trap is micro- all the way
Current amplifier, each road micro current amplifier are connected to MCU by variable connector；The polarising sheet of every section ion trap is connected to
One group of polarization power supply；It is controlled by MCU, measures the airion concentration value in each section of section respectively, and complete air is consequently formed
Ion mobility spectrometry data.
2. being limit mobility measured by first segment ion trap, the second section and later each section ion trap are surveyed
Amount is interval migration rate.
3. having collector insulation performance to determine measure, by detecting the leakage current of collecting board insulating support, it is judged
Insulation performance.
A kind of single channel tandem air ion Mobility Spectrum Analysis instrument, by sucking condenser type ion trap, micro-current
Amplifier, polarization power supply, MCU etc. are constituted, it is characterized in that: the ion trap of the analyzer is the collection of single-channel air ion
Device, each channel are made of several section ion traps, and every section collector all includes one group of collecting board, polarising sheet；Each section is received
Storage is connected in series, and is mounted in a metal shell, is followed by air exhauster；The speed of exhaust of each section collector is identical；Each section is received
The collecting board of storage is connected respectively to mutually independent micro current amplifier, and polarising sheet is connected respectively to mutually independent polarization electricity
Source, each output for saving micro current amplifier are connected by variable connector with MCU.
The collecting board and polarising sheet of each section collector are fixed on the metal shell of ion trap by insulating support respectively；
Insulating support is made of high insulating property material, is fitted with electrical heating type moisture separating device；It is equipped on collector metal shell
Electrical heating type moisture separating device.
The instrument has the measure of insulating support insulating properties detection；The insulating support insulating properties detection measure is using short
The sampling high resistant short circuit of micro current amplifier is cooperated the polarity for changing polarizing voltage defeated on micro current amplifier by way switch
The reading variable quantity that outlet obtains judges insulation performance.
A kind of Multi-channel parallel connection formula air ion Mobility Spectrum Analysis instrument, by sucking condenser type ion trap, micro-current
Amplifier, polarization power supply, MCU etc. are constituted, it is characterized in that:
The ion trap of the analyzer is multi-channel type air ion collector；Air ion collector is divided into several logical
Road, at least there are two channels, and each channel, which includes at least, one group of collecting board-polarising sheet pair, and each channel is mutually indepedent, is mounted on
In respective metal shell channel, it is followed by air exhauster；The speed of exhaust in each channel can it is identical can also be different；Second channel and
First segment collector in later each channel collects plate earthing as ion filter；The collecting board in each channel is separately connected
To mutually independent micro current amplifier, polarising sheet is connected respectively to mutually independent polarization power supply, each micro current amplifier
Output is connected by variable connector with MCU.
It can be with areal survey opposed polarity, different ions according to the air ion Mobility Spectrum Analysis method and instrument
The airion concentration value in mobility section makes complete air ion mobility spectrogram.
Detailed description of the invention
Fig. 1 is the schematic diagram of air ion Mobility measurement.
Fig. 2 single channel (tandem) air ion mobility spectrum measuring instrument functional block diagram.
Fig. 3 multichannel (parallel) air ion mobility spectrum measuring instrument functional block diagram
Fig. 4 insulating support and drive damp resistance wire, electric heating device scheme of installation.
The circuit diagram of Fig. 5 micro current amplifier A and short switch S
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
1. polarising sheet, 2. collecting board, 3. insulating support, 4. collector metal shell 5. drives damp 6. electricity of resistance wire in attached drawing
7. micro current amplifier of heating device, 8. short switch 9. is evacuated 10. polarization power supply of blower, 11. variable connector 12.MCU
13.LCD
Embodiment 1: single channel tandem air ion collector is used, one is divided into three section collectors, is mounted on one
In metal shell channel；The limit mobility of first segment collector is 0.4 (cm2/ VS), for collecting small ion；Second section
The interval migration rate of collector is 0.4~0.04 (cm2/ VS) for collecting intermediate ion；The interval migration of third section collector
Rate is 0.04~0.002 (cm2/ VS), for collecting big ion.Every section collector all includes one group of " collecting board-polarization
Plate " is right；The collecting board and polarising sheet of collector are parallel to each other along the direction of pumping airflow, and each collector that saves is connected in series, after
Connect air exhauster.The speed of exhaust of each section collector is identical.
The collecting board and polarising sheet of each section collector are fixed on the metal shell of ion trap by insulating support respectively；
Fig. 4 is insulating support and drives damp resistance wire, electric heating device scheme of installation, and insulating support is by poly- the four of heat-resisting high insulating property
Fluoride material is made, and is fitted with and drives lake resistance wire [5].Electric heating device is installed inside collector metal channel envelope
[6], once collector makes moist, wet steam can be driven away with heating power by driving damp resistance wire [5] and electric heating device [6].
The collecting board of each section collector is connected respectively to mutually independent micro current amplifier [7], and polarising sheet is separately connected
To mutually independent polarization power supply [10], each output for saving micro current amplifier is connected by variable connector [11] with MCU.
The polarising sheet of each section collector is connected with corresponding polarization power supply, and each polarizing voltage that saves is according to corresponding ion
Mobility and be arranged, each collecting board for saving collector, polarising sheet length be arranged according to corresponding ionic mobility.
Each component of the instrument is uniformly controlled by MCU.
The instrument has insulating support dampness, detection of electrical leakage measure.Fig. 5 is the electricity of micro current amplifier A and short switch S
Road connection figure.The input terminal of micro current amplifier [7] is connected with high resistant G and short switch S [8], and short switch S [8] is one
The special switching device with superelevation insulation；The switch is controlled by MCU, for detecting the zero point and insulation of micro current amplifier
The electric leakage degree of bracket.When short switch S [8] is closed, the reading zero of micro current amplifier output end；When it is decontroled, if
Air exhauster [9] does not start to be evacuated (sampling), then the variable quantity of the reading of micro current amplifier output end just represents insulating support
Electric leakage degree.When electric leakage degree is more than certain numerical value, MCU, which may turn on moisture separating device, makes insulating support restore insulation performance.
In addition, being formed by voltage in the output end of micro current amplifier if applying the polarizing voltage of opposed polarity on polarising sheet
It would also vary from, the difference of this voltage and the electric leakage degree of insulating support are related.Insulating support can be judged with it
Whether insulation performance is normal.
Embodiment 2 uses the parallel air ion collector of binary channels, and first passage includes three section collectors, is mounted on
In one metal shell channel；The limit mobility of first segment collector is 0.4 (cm2/cm2/ VS), for collecting small ion；
The interval migration rate of second section collector is 0.4~0.04 (cm2/ VS) for collecting intermediate ion；The area of third section collector
Between mobility be 0.04~0.004 (c m2/ VS), for collecting big ion.Second channel also includes three section collectors, and first
The collection plate earthing of collector is saved, limit mobility is 0.004 (cm2/cm2/ VS), for filtering collected by first passage
Air ion；The interval migration rate of second section collector is 0.004~0.0004 (cm2/ VS) for collect it is heavy greatly from
Son；The interval migration rate of third section collector is 0.0004~0.00005 (c m2/ VS) for collecting superheavy ion.Every section
Collector all includes one group " collecting board-polarising sheet " right；The collecting board and polarising sheet of collector along pumping airflow direction
Parallel to each other, each collector that saves is connected in series, and is followed by air exhauster.Each channel uses the different speed of exhausts.
Embodiment 1 can carry out it is small, in, big measuring ion, achievement unit ion mobility spectrogram；Embodiment 2 can be real
Now complete ionic mobility spectrometry makes complete ionic mobility spectrogram.
Claims (7)
1. a kind of air ion Mobility Spectrum Analysis method, it is characterized in that: this method will according to the size of Ion transfer rate score
Air ion mobility spectrum is divided into several sections；The air ion in each section is collected by a section ion trap；Every section
The collecting board of ion trap is connected to independent micro current amplifier all the way；Each road micro current amplifier is connected by variable connector
It is connected to MCU；The polarising sheet of every section ion trap is connected to one group of polarization power supply；The air in each section is controlled, completed by MCU
Complete air ion mobility spectrum data is consequently formed in ion concentration numerical measuring.
2. air ion Mobility Spectrum Analysis method as described in claim 1, it is characterized in that: sky measured by first segment collector
Gas ionic mobility is limit mobility, and ionic mobility measured by the second section and later each section collector is interval migration
Rate.
3. air ion Mobility Spectrum Analysis method as described in claim 1, it is characterized in that: having collector insulation performance degree to sentence
It sets down measures；By the open and close of MCU control short switch S [8], the leakage current of collecting board insulating support is detected, judges its insulation
Performance.
4. single channel tandem air ion Mobility Spectrum Analysis instrument, including sucking condenser type ion trap, micro-current magnification
Device, polarization power supply and MCU, it is characterized in that: the ion trap of the analyzer is single channel tandem air ion collector；It is logical
Road is made of several section ion traps, and every section collector all includes one group of collecting board, polarising sheet；Each section collector series connection phase
It connects, is mounted in a metal passage shell, is followed by air exhauster；The speed of exhaust of each section collector is identical, each section collector
Collecting board is connected respectively to mutually independent micro current amplifier, and polarising sheet is connected respectively to mutually independent polarization power supply, respectively
The output end of section micro current amplifier is connected by variable connector with MCU.
5. air ion Mobility Spectrum Analysis instrument as claimed in claim 4, it is characterized in that: the respectively collecting board of section collector and polarization
Plate is fixed in the metal passage shell of ion trap by insulating support respectively；Insulating support is by heat-resisting high-insulativity material system
At being fitted with electrical heating type moisture separating device；Electrical heating type moisture separating device is installed on collector metal channel envelope.
6. air ion Mobility Spectrum Analysis instrument as claimed in claim 4, it is characterized in that: the insulation performance with insulating support is examined
Survey measure；The insulating support insulating properties detection measure is short-circuit by the sampling high resistant of micro current amplifier using short switch,
And the polarity for changing polarizing voltage is cooperated to judge insulating properties in the output end reading variable quantity obtained of micro current amplifier
Energy.
7. Multi-channel parallel connection formula air ion Mobility Spectrum Analysis instrument, by sucking condenser type ion trap, micro current amplifier,
Polarization power supply, MCU are constituted, it is characterized in that: the ion trap of the analyzer is Multi-channel parallel connection formula ion trap, at least
Two passes；One group of ioncollection plate, polarising sheet are included at least in every channel；Each channel is mutually indepedent, is separately mounted to each
From metal shell channel in, be followed by air exhauster；The speed of exhaust in each channel can it is identical can also be different；In first passage
Its collecting board of first segment collector connect micro current amplifier, second channel and later each channel first segment collector be used as from
Sub- filter collects plate earthing.
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| CN201310576411.0A CN104634703B (en) | 2013-11-08 | 2013-11-08 | Air ion Mobility Spectrum Analysis method and instrument |
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| CN201310576411.0A CN104634703B (en) | 2013-11-08 | 2013-11-08 | Air ion Mobility Spectrum Analysis method and instrument |
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| CN104634703B true CN104634703B (en) | 2019-01-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928994B (en) * | 2016-04-26 | 2018-08-03 | 徐先 | Full-automatic air ion testing method and device |
| CN106597520B (en) * | 2016-12-13 | 2019-05-14 | 中国科学院电工研究所 | Triple channel runaway electron spectral measurement device under a kind of nanosecond pulse discharge |
| CN109725047A (en) * | 2019-02-21 | 2019-05-07 | 北京沃斯彤科技有限公司 | A kind of more mobility air ion detection devices |
| CN114184853A (en) * | 2021-12-14 | 2022-03-15 | 中国电力科学研究院有限公司 | Power frequency electric field measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202425U (en) * | 1986-04-22 | 1987-08-19 | 福建省龙溪无线电厂 | Air ion collector |
| GB2390678A (en) * | 2002-03-01 | 2004-01-14 | Msp Corp | Wide range particle counter and classifier |
| CN102192949A (en) * | 2010-02-02 | 2011-09-21 | 独立行政法人理化学研究所 | Differential mobility analyzer, particle measuring system, and particle sorting system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495823B1 (en) * | 1999-07-21 | 2002-12-17 | The Charles Stark Draper Laboratory, Inc. | Micromachined field asymmetric ion mobility filter and detection system |
| US6815668B2 (en) * | 1999-07-21 | 2004-11-09 | The Charles Stark Draper Laboratory, Inc. | Method and apparatus for chromatography-high field asymmetric waveform ion mobility spectrometry |
| JP2008102038A (en) * | 2006-10-19 | 2008-05-01 | Matsushita Electric Works Ltd | Charged particle amount evaluation system |
-
2013
- 2013-11-08 CN CN201310576411.0A patent/CN104634703B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202425U (en) * | 1986-04-22 | 1987-08-19 | 福建省龙溪无线电厂 | Air ion collector |
| GB2390678A (en) * | 2002-03-01 | 2004-01-14 | Msp Corp | Wide range particle counter and classifier |
| CN102192949A (en) * | 2010-02-02 | 2011-09-21 | 独立行政法人理化学研究所 | Differential mobility analyzer, particle measuring system, and particle sorting system |
Non-Patent Citations (2)
| Title |
|---|
| 空气离子测量仪;徐先等;《电子技术》;19951231(第12期);第541-543页 |
| 负离子纺织品的检测;徐先;《第四届功能性纺织品及纳米技术应用研讨会论文集》;20041014;第105-109页，图3 |
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